Comparison between International AC and DC
transmission:
A.C Transmission
|
D.C Transmission
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1. Three of his needs, and costs more than
copper.
|
1. Two of his eyes. Arthin paribahiteo niutrala
as the one found in tryansamit. The savings are more than copper.
|
2. Inductens, capasitens, power factor and the
effect of current surgeon.
|
2. Inductens, capasitens, power factor and the
surgeon there is no response.
|
3. Current skin effect.
|
3. No skin effect.
|
4. Inasulation Electrical stress on the need for
more haoyate inasulation is relatively high.
|
4. Inasulation on the electric a.c. Sira more
than 1.414 times. It takes less inasulation.
|
5. Charging current is induced attenuation. Or
even no - load conditions.
|
5. Charging current is induced attenuation.
|
6. Communication lines are produced by the
surrounding bodies, and the disruption and loss.
|
6. Communication lines are very low and the
waste produced by the surrounding bodies and less disruptive.
|
7. More pressure on the electrical inasulation
dioxide - more than an electric lasao.
|
7. Less pressure on the electrical inasulation
dioxide - electric lasao less.
|
8. Voltage regulation is demoted.
|
8. Voltage quality of the Regulation.
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9. Transmission styabilaijarer long line needs.
|
9. I do not need long transmission
styabilaijarer line.
|
Comparison
between International overhead and underground transmission and distribution
system:
Overhead system
|
Underground
system
|
1.Overhead
line, usually wood, concrete or Steal taoyare inasuletar madhyame fitting the
poll.
|
1. Underground
cable
through the bottom of the
soil generally
kanduit or go
through the
trench.
|
2.Poll at the
top of the line placement is likely to take so transformer accident.
|
2.Platforms are
installed
in the indoor
accident likely
will not.
|
3.Compared a
low initial cost.
|
3.The initial
cost is too high
compared.
|
4.Power line
extension, or change it.
|
4.Manhole,
daktc etc.
are permanently
installed.
This change is
not a chance.
Erajanya putting a new line to
change it.
|
5. Errors
likely.
|
5.The
probability of error
of less than
the underground trench.
|
6.Line, a
simple error detection and repair.
|
6.Line error detection
and repair is not easy for
many of the complex.
|
7.The distance
between the line condutor spacing more than
inductance line. Thus, the voltage drops too.
|
7.The distance
between the line condutor spacing inductance less than line. The voltage drop is less.
|
8.The distance
between the line of condutor
capactance and carjim current amount is less than line.
|
8.The distance
between the line condutor less than
the amount of the current line capactance and carjim.
|
9.Any object or
vegetation on his line of thunderstorms and the details of power supply
interruption.
|
9.Effects of
Lightning, and dropdown objects. The interruption of power supply and not.
|
10.Measures to
prevent the serge voltage.
|
10.Serge
voltage cable sith exploitation of the mineral.
|
11Open space
through the conductive line is, this is the beauty of the city.
|
11.beauty
occurs due to underground cable line.
|
12.Distribution
line, electricity theft through illegal connections are.
|
12. A person
may not, without proper authority others hand.
|
13.Any object
or vegetation on his line of thunderstorms and the details of power supply
interruption.
|
13. Effects of
Lightning, and dropdown objects. The interruption of power supply and not.
|
Advantages
of High Voltage transmission over Low Voltage transmission:
1.Transmission efficiency increases for low-end line of the Los.
2.Line is the line voltage drop is less than the standard outlets. The voltage regulation is very advanced.
3.Metarial transmission voltage conductor size vary, so if you have more than transmission voltage value is less than the cost of copper.
Overhead Transmission Line
Underground Transmission Line
More high transmission voltage limitation:
If the electrical power supply in case of more high bholteje is some difficulty. Such as -
1. Trnsmission voltage will be more, much more than line inasulession manao. This line will support the costs.
2. Ground clearence and conductor spacing should be greater. Increase in size proportional to the cross-arm and the Tower.
3. Transmission voltage will be more, so size will transformer and other control equipment. Thus, increasing the power supply voltage and power loss is less than the cost of the Rising copper, but the cost of increased transmis. So consider all aspects of the supply voltage value is increased to a certain limit mold, so that the overall profit of the whole system.
Comparing the cost of conductor of different overhead system:
a. For each method of transport (P watts) is equal.
b. For each method transmission line spacing (L meter) level.
c. For each method of waste (W watts) is equal.
d. Conductor and the Earth in every way, the maximum voltage (Vm volts) are equal.
COULD I will now discuss the theory person tahacech:
1.Transmission efficiency increases for low-end line of the Los.
2.Line is the line voltage drop is less than the standard outlets. The voltage regulation is very advanced.
3.Metarial transmission voltage conductor size vary, so if you have more than transmission voltage value is less than the cost of copper.
Overhead Transmission Line
Underground Transmission Line
More high transmission voltage limitation:
If the electrical power supply in case of more high bholteje is some difficulty. Such as -
1. Trnsmission voltage will be more, much more than line inasulession manao. This line will support the costs.
2. Ground clearence and conductor spacing should be greater. Increase in size proportional to the cross-arm and the Tower.
3. Transmission voltage will be more, so size will transformer and other control equipment. Thus, increasing the power supply voltage and power loss is less than the cost of the Rising copper, but the cost of increased transmis. So consider all aspects of the supply voltage value is increased to a certain limit mold, so that the overall profit of the whole system.
Comparing the cost of conductor of different overhead system:
a. For each method of transport (P watts) is equal.
b. For each method transmission line spacing (L meter) level.
c. For each method of waste (W watts) is equal.
d. Conductor and the Earth in every way, the maximum voltage (Vm volts) are equal.
COULD I will now discuss the theory person tahacech:
Lord kelvin
Expression for the most economic size of
conductor by Kelvin's law:
It's the first
well-known scientist Lord kelvin most economical conductor size of 1881 for a
diagnosis of a species stated. His opinion, the annual cost of a transmission
lines that cross the minimum required to keep, he will be the most economical
prasthacchedai. In other words, let's look a little differently presented, “The
most economical area of conductor is that for which the variable part of
annual charge is equal to the cost of energy losses per year”. Here is a
portion of the total line transmission two namely:
1. Annual cost of
energy wasted.
2. Annual charge on
capital outlay.
Annual charge on capital outlay:
Expenditure as a transmission line all most installation, cost and construction cost of the initial cost of conductor saport and inasuletar annual interest and depreciation value. The line of cases, the overhead cost Constant Insulator-conductor cable cross section depends on the cost. Therefore, obhabaheda transmission line is expressed as an annual charge .
Annual interest and depreciation = TK. (P1 + P2A) ... ... .. 1
P1 and P2 and A certain number of conductor area.
Annual cost of energy wasted.:
I ² R loss conductar current induced energy dissipation. The Constant Current flow lines during the whole year is wasted energy produced by the conductor regisistance. The conductor area regisistance vary, so the overhead line, the annual apacayake
Annual charge on capital outlay:
Expenditure as a transmission line all most installation, cost and construction cost of the initial cost of conductor saport and inasuletar annual interest and depreciation value. The line of cases, the overhead cost Constant Insulator-conductor cable cross section depends on the cost. Therefore, obhabaheda transmission line is expressed as an annual charge .
Annual interest and depreciation = TK. (P1 + P2A) ... ... .. 1
P1 and P2 and A certain number of conductor area.
Annual cost of energy wasted.:
I ² R loss conductar current induced energy dissipation. The Constant Current flow lines during the whole year is wasted energy produced by the conductor regisistance. The conductor area regisistance vary, so the overhead line, the annual apacayake
transmission are expressed as: annual
energy produced by waste Costs = TK.Q / A ... .. 11
Q is another real number.
Year total financial loss, = L = TK. {(P1 + P2) + Q / A} ... .. 111
The dL / dA = 0, then this loss will be less than the amount most.
dL / dA = d / dA (P1 + PA + Q / A)
= P-Q / A ²
Minimum financial losses from overhead power lines transmission
0 = P-Q / A ² or PA = Q / A
or
variable part of annual charge = Annual cost of energy wested.
A = √ Q / P ... ... IV
N.B:- we can find out the next blog different aspects of system loss. I am an engineer, so you can collect various power plante information is all about. Next week you can also learn new things.
Q is another real number.
Year total financial loss, = L = TK. {(P1 + P2) + Q / A} ... .. 111
The dL / dA = 0, then this loss will be less than the amount most.
dL / dA = d / dA (P1 + PA + Q / A)
= P-Q / A ²
Minimum financial losses from overhead power lines transmission
0 = P-Q / A ² or PA = Q / A
or
variable part of annual charge = Annual cost of energy wested.
A = √ Q / P ... ... IV
N.B:- we can find out the next blog different aspects of system loss. I am an engineer, so you can collect various power plante information is all about. Next week you can also learn new things.
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